Description
Honeywell IQ3XCITE-IO-8DI
Technical Specifications
- Channel Quantity: 8 independent digital input channels
- Input Signal Type: Dry contact, 24VDC sinking / sourcing discrete input
- Rated Input Voltage: 18VDC to 30VDC
- Communication Interface: XCITE dedicated I/O bus
- I/O Bus Maximum Length: 30 meters for local layout, 300 meters for IQ4E compatible network
- Working Ambient Temperature: 0°C to +60°C
- Storage Temperature: -40°C to +85°C
- Relative Humidity: 5% to 90% RH non-condensing
- Isolation Rating: 500VAC channel to logic isolation
- Mounting Method: TS35 standard DIN rail mounting
- Certification: UL60730, CE, RoHS
Functional Features Each channel supports configurable sinking and sourcing input mode. It provides adjustable signal debounce time to eliminate mechanical contact bounce interference. It sends real-time channel on-off status and diagnostic information to the host controller. It has independent LED status indicator for each channel and module power fault indicator. It supports hot pluggable bus connection with two-part removable terminal connectors. It supports cascading connection with other XCITE I/O modules on the same I/O bus. It detects open circuit fault for wired input loops. It allows up to 15 XCITE I/O modules to connect with one IQ3XCITE host controller.
Application Scenarios HVAC fan and pump running feedback signal collection Air conditioning damper limit switch status monitoring Building fire smoke damper interlock contact signal acquisition Chiller unit safety interlock dry contact input Ventilation filter differential pressure switch signal collection Building automation BMS spare I/O expansion module replacement
Performance Parameters
- Input Response Delay: Less than 0.5ms after debounce expiration
- Insulation Resistance: Greater than 1000 MΩ
- Mean Time Between Failures: 950000 hours
- ESD Immunity: 8kV contact discharge
- Channel Leakage Current: Less than 10μA at off state
- Terminal Wiring Specification: 0.5mm² to 2.5mm² copper wire
Material Composition FR4 flame retardant PCB substrate High speed optocoupler isolation array TVS transient voltage suppression diodes Metal film sampling resistors Nylon UL94 V-0 terminal block ABS flame retardant plastic housing Green and yellow LED status indicators Steel DIN rail spring clip
Structural Features Compact rectangular housing optimized for DIN rail installation. Front panel integrates terminal block and channel LED indicators. Rear side dedicated I/O bus connector for inter-module connection. Internal circuit layout separates field signal zone and bus communication logic zone. Quick-release locking clip secures the module firmly on DIN rail. Removable terminal plug supports pre-wiring before module installation. Anti-misalignment key notch prevents reverse bus connection.
Working Principle Field discrete signal or dry contact closes the input loop. The optocoupler converts the field signal into isolated logic level signal. The on-board logic chip reads each channel status and filters bounce signal according to configured debounce parameter. Valid status data is packaged and transmitted to IQ3XCITE host controller through XCITE I/O bus. If the wiring circuit is open, the module triggers fault flag and uploads fault code to the host.
Installation Requirements Mount IQ3XCITE-IO-8DI on TS35 DIN rail inside dry control cabinet. Wire field switch shielded cable to the corresponding channel terminal. Connect XCITE I/O bus cable between the module and host controller or adjacent XCITE I/O module. Configure channel input mode and debounce time in IQ3 engineering software. Power on the I/O bus and verify LED status matches field switch action. Separate signal wiring from high voltage power cable in wiring duct.
Usage Notes Do not apply AC voltage to any input terminal. The maximum quantity of XCITE I/O modules connected to one host controller cannot exceed 15 units. Shielded twisted pair cable is mandatory for long distance field wiring. Tighten terminal screws to specified torque to avoid poor contact under cabinet vibration. Do not install this module in outdoor exposed environment without protection enclosure.
